Baqheleke kangakanani abantu abaneenwele ezibomvu kunye namehlo aluhlaza?

Umxholo

• Ufumana njani umntu iinwele ezibomvu namehlo aluhlaza
• Yeyiphi imfuza ebangela iinwele ezibomvu?
• Ngaba abantu abaneenwele ezibomvu, nabanamehlo aluhlaza bayaphela?
• Izinwele ezibomvu, amehlo aluhlaza kwabasetyhini ngokuchasene nabesilisa
• Izinwele ezibomvu, amehlo aluhlaza, kunye nesobunxele

Ushwankathelo

Uluhlu lwemibala yeenwele zendalo, imibala emnyama yeyona ixhaphakileyo- ngaphezulu kwama-90 eepesenti abantu kwihlabathi liphela baneenwele ezimdaka okanye ezimnyama. Oko kulandelwa ziinwele ezimhlophe.

Izinwele ezibomvu, ezenzeka nje kubemi, zezona ziqhelekileyo. Amehlo aluhlaza ngokufanayo aqhelekanga, kwaye banokuba banqabile.

Olunye uphononongo lufumanise ukuba phakathi kowe-1899 nowe-1905, ngaphezulu kwesiqingatha sabantu abamhlophe ababengengabo abemi baseSpain eUnited States babenamehlo aluhlaza. Kodwa ukususela ngo-1936 ukuya ku-1951, elo nani lehla laya kuma-33.8 ekhulwini. Namhlanje, uqikelelo lubonisa malunga neepesenti ezili-17 zabantu kwihlabathi liphela abanamehlo aluhlaza.

Umbala weenwele zakho kunye nombala wamehlo wehlela koluphi ufuzo olizuze njengelifa kubazali bakho. Ukuba umntu omnye uneenwele ezibomvu namehlo aluhlaza, kukho ithuba elihle lokuba omnye okanye bobabini abazali benze njalo, kodwa hayi rhoqo.

Kuya kufuneka udle ilifa iiseti ezimbini zolwazi lwemfuzo kuzo zombini iinwele zakho kunye nombala wamehlo akho ukuze ube nezi mpawu ziqhelekileyo. Amathuba okuba kwenzeke oku kunqabile, ngakumbi ukuba akukho namnye kubazali bakho oneenwele ezibomvu okanye amehlo aluhlaza.Ngamanye amaxesha, nangona kunjalo, iinkwenkwezi zemfuza ziyahambelana, kwaye abantu bazalwa benendibaniselwano enqabileyo yeenwele ezibomvu namehlo aluhlaza.

Ufumana njani umntu iinwele ezibomvu namehlo aluhlaza

Iimpawu zeGene ziwela ngokwamacandelo amabini: ukuguquguquka kunye nokulawula. Abazali babelana ngesicwangciso seempawu ezininzi, ukusuka kumbala weenwele ukuya kubuntu, kwiijethi zabo.

Nangona umbala weenwele uphenjelelwa zizakhi zofuzo ezininzi, ngokubanzi, izakhi zofuzo eziphumelelayo ziphumelela kwimidlalo yentloko ukuya entloko ngokuchasene nofuzo oluphindaphindeneyo. Iinwele ezimdaka kunye namehlo ansundu, umzekelo, zombini zibalasele, yiyo loo nto zenza ipesenti enkulu yokudityaniswa kombala weenwele namehlo.

Abazali banokuba ziziphatho zofuzo oluphindaphindeneyo. Ngelixa banokubonisa ezona zinto zibalulekileyo, basenazo- kwaye banokudlula ebantwaneni babo- iigene zemfuza. Umzekelo, abazali abaneenwele ezimdaka ngebala, nabanamehlo ansundu banokuba nomntwana oneenwele ezimhlophe namehlo aluhlaza.

Bobabini abazali banokubonisa iimpawu eziguqukayo zemfuza, kwaye banokuzidlulisela nakubantwana babo. Umzekelo, ukuba bobabini abazali baneenwele ezibomvu, umntwana ufumana ubukhulu becala ulwazi ngemfuza ngeenwele ezibomvu, ke amathuba okuba babe neenwele ezibomvu aphantse abe li-100 leepesenti.

Ukuba omnye umzali unentloko ebomvu kwaye omnye akunjalo, amathuba okuba umntwana wabo abe neenwele ezibomvu malunga neepesenti ezingama-50, nangona umthunzi obomvu unokuhluka kakhulu.

Okokugqibela, ukuba bobabini abazali bangabathwali bokungafani kofuzo kodwa abanazinwele zibomvu, umntwana unethuba eli-1 kwele-4 lokuba neenwele ezibomvu ngokwenene. Umzekelo oyinyani welifa lombala weenwele unzima ngakumbi, nangona kunjalo, njengoko zininzi iintlobo zofuzo ezichaphazelekayo.

Yeyiphi imfuza ebangela iinwele ezibomvu?

IiMelanocytes ziiseli ezenza i-melanin kulusu lwakho. Inani kunye nohlobo lwe-melanin oluveliswa ngumzimba wakho luchaza ubumnyama okanye ukukhanya kolusu lwakho. Izinwele ezibomvu ziziphumo zokwahluka kwemfuza okubangela iiseli zolusu lomzimba kunye neeseli zeenwele ukuvelisa ngaphezulu kolunye uhlobo oluthile lwe-melanin kunye nokuncinci kolunye.

Uninzi lweentloko ezibomvu zinokutshintsha kwemfuza kwi-melanocortin 1 receptor (MC1R). Xa i-MC1R ingasebenzi, umzimba uvelisa ngaphezulu pheomelanin, ejongene nolusu olubomvu kunye neethoni zeenwele, kune-eumelanin, ejongene nemithunzi yombala omdaka nomnyama. Kubantu abane-MC1R esebenzayo, i-eumelanin inokulinganisa i-pheomelanin, kodwa kwi-redheads, umahluko wofuzo uthintela oko.

Nokuba unayo okanye ikopi ye-MC1R yemfuza engasebenziyo inokumisela umthunzi weenwele ezibomvu onazo, ukusuka kwi-strawberry blonde ukuya kwi-auburn enzulu ukuya kubomvu oqaqambileyo. Olu hlobo lunoxanduva lokuphindaphindeka kwimibala emininzi ebomvu, nayo.

Ngaba abantu abaneenwele ezibomvu, nabanamehlo aluhlaza bayaphela?

Unokukholelwa ukuba ngenxa yokuba ezi mpawu zemfuza zinqabile, zinokuhlanjululwa ngaphandle kwequla. Ayinakwenzeka loo nto. Naxa ungaziboni iimpawu eziguqulwayo - iinwele ezibomvu, umzekelo - zisekhona, zifihle ii-chromosomes zomntu.

Xa umntu enomntwana, banokulugqithisela ulwazi lwabo lofuzo kubantwana babo, kwaye umkhwa unokuphumelela. Kungenxa yoko le nto into efana neenwele ezibomvu okanye amehlo aluhlaza "ingatsiba" izizukulwana kwaye ibonise amanyathelo ambalwa ezantsi kusapho.

Izinwele ezibomvu, amehlo aluhlaza kwabasetyhini ngokuchasene nabesilisa

Izinwele ezibomvu zixhaphake kakhulu kwabasetyhini, ngokwe. Nangona kunjalo, abesilisa baseCaucasus kunokwenzeka ukuba babe namehlo aluhlaza kunabasetyhini, ibonisa. Ngokudityaniswa kweenwele ezibomvu namehlo aluhlaza, uphando oluncinci lujonge ukuba yeyiphi isondo ekunokwenzeka ukuba iphuhlise le combo ingaqhelekanga.

Izinwele ezibomvu, amehlo aluhlaza, kunye nesobunxele

Iintloko ezibomvu ziyazi ukuba umbala wazo weenwele ayisiyiyo kuphela into eyingqayizivele. Ngapha koko, iintloko ezibomvu zinolunye utyekelo olunqabileyo.

Akuvumelekanga ukucebisa ukuba iintloko ezibomvu zinokubakho ngakumbi ukuba zibe zezasekhohlo. Njengeenwele ezibomvu, isandla sasekhohlo luphawu oluqhubekayo. Kwi-hemisphere yaseNtshona, i-10 ukuya kwi-15 ekhulwini labantu basebenzisa isandla sasekhohlo kakhulu.

Iintloko ezibomvu kucingelwa ukuba zibuthathaka ngakumbi kwintlungu, nayo, ibonisa. Kwaye banokuba ne-anesthetic ngakumbi ngexesha lotyando okanye i-anesthesia yendawo.

Ngelixa iintloko ezibomvu zizalwa kwihlabathi liphela, kunokwenzeka ukuba zikhule kwi-hemisphere esemantla. Nangona malunga ne-1-2% yabemi behlabathi inenwele ebomvu ebomvu, loo pesenti inyukela kumantla eikhweyitha.